Home / Prompt-injection firewalls & guardrails / PurpleLlama (Llama Guard, Prompt Guard, LlamaFirewall)
PurpleLlama (Llama Guard, Prompt Guard, LlamaFirewall)
Meta's set of open tools to assess and improve LLM security, including Llama Guard classifiers and LlamaFirewall.
Open source
| Category | Prompt-injection firewalls & guardrails |
|---|---|
| Official site | github.com/meta-llama/PurpleLlama |
| Maker | Meta |
| Ownership / acquisition | Not published / not yet verified |
| License model | Open source |
| License | Not published / not yet verified |
| Public pricing | Free (open source) |
| Source code | meta-llama/PurpleLlama |
| Last verified | 2026-10-17 |
Facts are taken from the vendor's own site, GitHub, or a linked public source. Blank means we could not confirm it, not that it does not exist. Vendors can request a correction for free.
Lab result
Not yet tested. When we test a tool we run our attack batteries (prompt injection, indirect injection, MCP tool poisoning and more) and publish the result here, good or bad.